When I started with Photoshop about 10+ years ago, I went on a local Adult Learning course. It took me from nothing, via learning things that I don't necessarily use now, but learning the program pretty well. It was good to have someone there to help when problems arose. Pointing out relevant shortcuts, and common mistakes.

You can't ask a video what went wrong.

There are parts of the program that I learned on the courses I went on, but never use. There is even more that I have never touched because they do things that I don't need, and/or have any interest in. :shrug:
However, if that is not a route that appeals, books, videos, websites, online courses, there is so much choice, it is deciding which route appeals. People learn in different ways. It's finding which way is best for you. :shrug:
And then it's finding which are best books, videos or websites etc.
If it is videos, then think of something you want to do, correct colours, correct exposure, replace a sky, remove spots, be that sensor dust, or spots on peoples faces,

whatever, by following those videos you should pick up how the program works to some degree. But nobody knows how the whole program works, and most just learn what they need to learn to do what they want. :shrug: